Análise de durabilidade das barras de fibra de vidro comparada com as barras de aço CA-50 e CA-60

Abstract

To ensure the final quality in civil construction, it is necessary to use materials that contribute to improving results through technological advances. One of these materials is fiberglass used as bars in concrete structures. These rebars can be used in several ways, providing an increase in tensile strength for reinforced concrete structures. The main objective of this study was to demonstrate the greater durability of fiberglass bars in relation to CA-50 and CA-60 steel bars used in civil construction, through comparative physical and chemical analyses, characteristics and properties between steel and fiberglass rebars. A bibliographic review was carried out throughout the study, consisting of a review of the literature through descriptive and qualitative research, aiming to gather information and explore concepts related to the subject in a clear and objective way. In the methodology, several studies were carried out with bars, which were subjected to a common external environment, an environment submerged with hydrochloric acid, in a high-temperature oven and in a test specimen submerged in water. The following results were obtained: the fiberglass bar performed excellently in the external environment, and did not lose any properties or thickness when submerged in hydrochloric acid, maintaining its properties and diameter with a change in color toward red. When it was subjected to an environment of extreme temperatures (0-450ºC) in the oven, it suffered a great loss of properties and diameter, simulating a fire situation, becoming malleable. We conclude that fiberglass bars have greater durability than CA-50 and CA-60 steel bars.